V√ LVULA SECURITY BALDER. 3 male - female 1/2 "(NF). Mod. Optimax. Cointra Mod. M15L, M20IP, A20L, C15L, E20L. C.O. 7485 = 9160054. Saunier Duval Mod. Combitek, Themis, Thema. C.O. 056110. Ferroli Mod. Master R 12. C.O. Fer39800130. standard - Cam model manufacturer Optimax 56110 Optimax 7485 Optimax 9160054